Rolex Lady-Datejust 28 Yellow Gold — Diamond Bezel Silver Roman Dial | Ref. 279138RBR

Reference 279138RBR represents the Lady-Datejust 28 at its most jewellery-forward: a 28mm case in 18ct yellow gold adorned with a factory-set 44-diamond bezel, paired with a silver dial reading the hours in elegant Roman numerals. The RBR designation in the model number is Rolex’s internal coding confirming the diamond bezel specification — a feature that transforms this Datejust from a precision timepiece into a gem-set luxury object of the first order. At 28mm, the proportions are definitively feminine, designed to sit delicately on slender wrists without sacrificing the iconic cyclops lens date magnification at 3 o’clock.

Driving the 279138RBR is a Rolex manufacture calibre suited to the Lady-Datejust’s case volume, delivering self-winding operation via a rotor and the Superlative Chronometer rating that guarantees accuracy within +/-2 seconds per day after leaving Rolex’s certification process. The fully integrated Oyster case maintains water resistance to 100 metres — a specification rarely challenged in this watch’s intended context but evidence of Rolex’s uncompromising engineering standards regardless of gender or intended use. The yellow gold Jubilee bracelet, in the same 18ct yellow gold as the case, provides five-link suppleness that complements the watch’s jewellery character perfectly.

For the collector focused on Rolex’s ladies’ line, the 279138RBR occupies a position analogous to what the gem-set Day-Date represents in the men’s collection: the definitive statement of the range. It suits the buyer who wears their watch as an accessory coordinated with fine jewellery, and who values the permanence of Rolex’s factory gem-setting over aftermarket modifications. On the secondary market, factory diamond bezel Lady-Datejust references retain value significantly better than aftermarket-set equivalents, making the 279138RBR’s original specification a meaningful investment consideration.